#include <stdlib.h>
#include <time.h>
struct tm *make_tm(int year,int mon,int day,int hour,int min,int sec){
    struct tm *tmb;
    tmb = (struct tm *)malloc(sizeof(tmb));
    if (tmb == NULL){
        return NULL;
    }
    *tmb = (struct tm){
        .tm_sec = sec, .tm_min = min, .tm_hour = hour,
        .tm_mday = day, .tm_mon = mon, .tm_year = year
    };
    return tmb;
}